It is often asked: Is Rails a good fit if I only need to serve an API? In this episode I show how to use the Rails API gem to create a slimmer Rails application designed to respond with JSON.
(9 minutes)

The Chosen plugin makes it easy to turn a many-to-many select menu into a searchable token field. Then see how the jQuery Tokeninput field can help with AJAX loading and creating new records.
(10 minutes)

With hstore you can add schema-less data to PostgreSQL. This allows you to store model attributes without creating separate database columns. Watch how to do this using the activerecord-postgres-hstore gem.
(10 minutes)